CVE-2020-15669
Publication date 1 October 2020
Last updated 25 August 2025
Ubuntu priority
Description
When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified. This results in a use-after-free and we presume that with enough effort it could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.12 and Thunderbird < 68.12.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| thunderbird | ||
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Fixed 78.7.1+build1-0ubuntu0.20.04.1
|
|
| 18.04 LTS bionic |
Fixed 1:78.8.1+build1-0ubuntu0.18.04.1
|
|
| 16.04 LTS xenial | Ignored end of standard support, was needed | |
| 14.04 LTS trusty | Not in release | |
| firefox-esr | ||
| 22.04 LTS jammy | Not in release | |
| 20.04 LTS focal | Not in release | |
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty | Not in release |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
8.8 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |